Quick Answer
- Lexus's 2021 to 2024 IS manuals list 235/40R19 front (26.40 in) with 265/35R19 rear (26.30 in), about 0.4% apart; the 18 inch size is 235/45R18 (26.33 in). The ES lists 215/55R17 (26.31 in), 235/45R18 and 235/40R19 (calculated diameters).
- Lexus says to use only recommended tire sizes and not to mix tires of different makes, models or tread patterns. Lexus publishes no diameter percentage.
- To check another size, enter your model's stock size and the target size below: you get the diameter difference and speedometer error.
Lexus common sizes: quick load:
Lexus IS
2014–presentNut torque: 76 ft-lbf (103 N-m) in the 2016 and 2018 manuals; 103 ft-lbf (140 N-m) in 2021 to 2024
Lexus ES
2019–presentNut torque: 76 ft-lbf (103 N-m)
Lexus NX
2015–presentNut torque: 76 ft-lbf (103 N-m) in 2020; 103 ft-lbf (140 N-m) in 2022 to 2024
Lexus RX
2016–presentNut torque: 76 ft-lbf (103 N-m) in 2018; 103 ft-lbf (140 N-m) in 2023 and 2024
Lexus UX
2019–presentNut torque: 76 ft-lbf (103 N-m)
Lexus RC and RC F
2015–presentNut torque: 76 ft-lbf (103 N-m) in the 2020 manuals; 103 ft-lbf (140 N-m) in the 2024 manuals
Lexus LC
2018–presentNut torque: 103.3 ft-lbf (140 N-m)
Lexus GX
2010–presentNut torque: 76 ft-lbf (103 N-m) GX 460; 97 ft-lbf (131 N-m) GX 550
Lexus LX
2022–presentNut torque: 97 ft-lbf (131 N-m)
OEM Stock Tire Sizes: IS · ES · NX · RX · GX · LX
Factory tire sizes from Lexus owner's manuals. Diameters, sidewall heights and revs per mile are calculated. Use as a baseline in the Compare or Model Fitment tabs above. Bolt pattern, centre bore and offset are not published in the Lexus manuals we hold, so they are not listed.
| Model | Years | Size | Trim / Source | Diam (in) | Diam (mm) | Sidewall (in) | Revs/Mile | Rim Width |
|---|---|---|---|---|---|---|---|---|
| IS | 2016–2020 | 225/45R17 | 2016, 2018 manuals | 24.97″ | 634.3 | 3.99″ | 808 | 7 1/2J |
| IS | 2016–2020 | 225/40R18 | 2016, 2018 manuals (front) | 25.09″ | 637.2 | 3.54″ | 804 | 8J |
| IS | 2016–2020 | 255/35R18 | 2016, 2018 manuals (rear) | 25.03″ | 635.7 | 3.51″ | 806 | 8 1/2J |
| IS | 2021–present | 235/45R18 | 2021 to 2024 manuals | 26.33″ | 668.7 | 4.16″ | 766 | 8 1/2J |
| IS | 2021–present | 235/40R19 | 2021 to 2024 manuals (front) | 26.40″ | 670.6 | 3.70″ | 764 | 8 1/2J |
| IS | 2021–present | 265/35R19 | 2021 to 2024 manuals (rear) | 26.30″ | 668.1 | 3.65″ | 767 | 9 1/2J |
| ES | 2019–present | 215/55R17 | 2019 to 2024 manuals | 26.31″ | 668.3 | 4.66″ | 767 | 7 1/2J |
| ES | 2019–present | 235/45R18 | 2019 to 2024 manuals | 26.33″ | 668.7 | 4.16″ | 766 | 8J |
| ES | 2019–present | 235/40R19 | 2019 to 2024 manuals | 26.40″ | 670.6 | 3.70″ | 764 | 8J |
| NX | 2015–2021 | 225/65R17 | 2020 manual | 28.52″ | 724.3 | 5.76″ | 707 | 7J |
| NX | 2015–2021 | 225/60R18 | 2020 manual | 28.63″ | 727.2 | 5.31″ | 704 | 7 1/2J |
| NX | 2015–2021 | 235/55R18 | 2020 manual | 28.18″ | 715.7 | 5.09″ | 716 | 7 1/2J |
| NX | 2022–present | 235/60R18 | 2022 to 2024 manuals | 29.10″ | 739.2 | 5.55″ | 693 | 7 1/2J |
| NX | 2022–present | 235/50R20 | 2022 to 2024 manuals | 29.25″ | 743.0 | 4.63″ | 689 | 7 1/2J |
| RX | 2016–2022 | 235/65R18 | 2018 manual | 30.03″ | 762.7 | 6.01″ | 672 | 8J |
| RX | 2016–2022 | 235/55R20 | 2018 manual | 30.18″ | 766.5 | 5.09″ | 668 | 8J |
| RX | 2023–present | 235/60R19 | 2023, 2024 manuals | 30.10″ | 764.6 | 5.55″ | 670 | 8J |
| RX | 2023–present | 235/50R21 | 2023, 2024 manuals (101W on RX 500h) | 30.25″ | 768.4 | 4.63″ | 667 | 8J |
| GX | GX 460 | 265/60R18 | 2023 manual (P-metric) | 30.52″ | 775.2 | 6.26″ | 661 | 7 1/2J |
| GX | GX 460 | 265/55R19 | 2023 manual | 30.48″ | 774.1 | 5.74″ | 662 | 7 1/2J |
| GX | GX 550 (2024+) | 265/70R18 | 2024 manual | 32.61″ | 828.2 | 7.30″ | 619 | 7 1/2J |
| GX | GX 550 (2024+) | 265/55R20 | 2024 manual | 31.48″ | 799.5 | 5.74″ | 641 | 7 1/2J |
| GX | GX 550 (2024+) | 265/50R22 | 2024 manual | 32.43″ | 823.8 | 5.22″ | 622 | 7 1/2J |
| LX | LX 600 | 265/65R18 | 2023, 2024 manuals | 31.56″ | 801.7 | 6.78″ | 639 | 7 1/2J |
| LX | LX 600 | 265/55R20 | 2023, 2024 manuals | 31.48″ | 799.5 | 5.74″ | 641 | 8J |
| LX | LX 600 | 265/50R22 | 2023, 2024 manuals | 32.43″ | 823.8 | 5.22″ | 622 | 8J |
Bolt pattern, centre bore and offset are not published in the Lexus manuals we hold. Diameters: Rim × 25.4 + 2 × (Width × Aspect ÷ 100).
Popular Upgrade Sizes: Calculated Diameter Changes
Diameter and speedometer changes between sizes Lexus lists in its manuals. This is arithmetic only. We do not state fender clearance or AWD safety because Lexus does not publish them, and Lexus's manual says to use only recommended tire sizes.
| Model | Stock Size | Upgrade Size | Diam Δ | Diam % | Speedo Error | Note |
|---|---|---|---|---|---|---|
| IS | 225/45R17 | 225/40R18 | +0.11″ | +0.5% | -0.5% | 2016 to 2020 manuals: 17 inch to the 18 inch front size |
| IS | 235/45R18 | 235/40R19 | +0.07″ | +0.3% | -0.3% | 2021+ manuals: 18 inch to the 19 inch front size |
| IS | 225/40R18 | 255/35R18 | -0.06″ | -0.2% | +0.2% | 2016 to 2020 front to rear size |
| IS | 235/40R19 | 265/35R19 | -0.10″ | -0.4% | +0.4% | 2021+ front to rear size |
| ES | 215/55R17 | 235/45R18 | +0.02″ | +0.1% | -0.1% | Both are Lexus factory sizes |
| ES | 235/45R18 | 235/40R19 | +0.07″ | +0.3% | -0.3% | Both are Lexus factory sizes |
| NX | 235/60R18 | 235/50R20 | +0.15″ | +0.5% | -0.5% | 2022+ factory sizes |
| RX | 235/60R19 | 235/50R21 | +0.15″ | +0.5% | -0.5% | 2023+ factory sizes |
| GX | 265/70R18 | 265/55R20 | -1.13″ | -3.5% | +3.6% | GX 550 factory sizes |
| GX | 265/70R18 | 265/50R22 | -0.17″ | -0.5% | +0.5% | GX 550 factory sizes |
| LX | 265/65R18 | 265/55R20 | -0.09″ | -0.3% | +0.3% | LX 600 factory sizes |
| LX | 265/65R18 | 265/50R22 | +0.87″ | +2.8% | -2.7% | LX 600 factory sizes |
A larger tire makes the speedometer read low. Use the Compare tab for your own sizes.
Model Wheel Specs: IS · ES · NX · RX · GX · LX
| Model | Years | Rim Widths | Wheel Torque | Source |
|---|---|---|---|---|
| IS | 2016–2020 / 2021–present | 7 1/2J, 8J, 8 1/2J, 9 1/2J | 76 ft-lbf (103 N-m) / 103 ft-lbf (140 N-m) | 2016, 2018, 2021, 2023, 2024 Owner's Manuals |
| ES | 2019–present | 7 1/2J, 8J | 76 ft-lbf (103 N-m) | 2019 to 2024 Owner's Manuals |
| NX | 2020 / 2022–present | 7J, 7 1/2J | 76 ft-lbf (103 N-m) / 103 ft-lbf (140 N-m) | 2020, 2022 to 2024 Owner's Manuals |
| RX | 2018 / 2023–present | 8J | 76 ft-lbf (103 N-m) / 103 ft-lbf (140 N-m) | 2018, 2023, 2024 Owner's Manuals |
| GX | GX 460 / GX 550 | 7 1/2J | 76 ft-lbf (103 N-m) / 97 ft-lbf (131 N-m) | 2023 GX 460 and 2024 GX 550 Owner's Manuals |
| LX | LX 600 | 7 1/2J, 8J | 97 ft-lbf (131 N-m) | 2023 and 2024 Owner's Manuals |
Lexus Tire Rules: What the Owner's Manuals Say
Rules from Lexus's owner's manuals for tire sizes, mixing tires, snow tires and wheels. We publish no forum-based size or winter-set recommendations.
| Topic | What Lexus says | Source |
|---|---|---|
| Tire sizes | Do not use tire sizes other than those recommended by Lexus. | 2024 Owner's Manuals, tire care |
| Mixing tires | Do not mix tires of different makes, models or tread patterns, or of remarkably different treadwear. Do not mix summer, all season and snow tires, or radial, bias-belted and bias-ply tires. | 2024 Owner's Manuals, tire care |
| Snow tires | When installing snow tires, replace all four tires, and select tires of the same size, construction and load capacity as the original ones. Winter tires should be fitted on all wheels, the same size and brand. | 2024 RX, NX and IS Owner's Manuals |
| Wheel selection | Replacement wheels should be equivalent in load capacity, diameter, rim width and inset (offset). Lexus does not recommend wheels of different sizes or types, used wheels, or bent wheels that have been straightened. | 2024 NX and RX Owner's Manuals |
| Tire chains | The IS manuals give separate chain instructions for vehicles with front and rear tires of the same size. The NX manual notes chains cannot be mounted on 235/50R20 tires. | 2024 IS and NX Owner's Manuals |
How to Use This Calculator
Decode Size tab
- Click a Lexus preset or type a custom size (format: 235/45R18).
- Click "Calculate" to see overall diameter, sidewall height, circumference, revolutions per mile, and a scaled SVG profile.
- Click "Show formula & worked example" to see the arithmetic for your size.
- Use the Inches / Metric toggle at the top to switch all result units.
Compare Sizes tab
- Use the "Load stock size" quick-buttons to populate Stock (A), or type your model's stock size.
- Enter your proposed size in the New (B) field.
- Click "Compare Sizes" to see the % diameter change, speedometer error and the size-change rating.
- Lexus's manual says to use only recommended tire sizes, so check any other size with a Lexus dealer.
Model Fitment tab
- Select your Lexus model (IS / ES / NX / RX / GX / LX).
- The model's factory tire sizes, rim widths, wheel torque and source manual appear.
- Enter a Width (mm), Aspect (%) and Rim size (in), then click "Check Fitment" to compare it with the factory size.
By Diameter tab
- Click a factory diameter button or type a target diameter and rim size.
- Click "Find Sizes" to scan standard widths and aspects and return every size within ±2%.
- The top result is the nearest match.
Lexus Rules tab
- Read what Lexus's owner's manuals say about tire sizes, mixing tires, snow tires and wheels.
Formula Reference: Tire Diameter, Speedo Error & AWD Rules
All calculations use standard tire-size formulas. Results are arithmetic; Lexus publishes no diameter percentage in the manuals we checked.
Metric Tire (e.g. 235/40R19: IS front, 2021+): Sidewall (mm) = Width × Aspect ÷ 100 = 235 × 0.40 = 94.0 mm Overall Diameter = Rim × 25.4 + 2 × Sidewall = 482.6 + 188.0 = 670.6 mm = 26.40″ Circumference (in) = π × 26.40 = 82.94″ Revs / Mile = 63,360 ÷ 82.94 = 764 IS 2021+ staggered rear (265/35R19): Sidewall (mm) = 265 × 0.35 = 92.75 mm Overall Diameter = 482.6 + 185.5 = 668.1 mm = 26.30″ Diameter difference = 26.40 − 26.30 = 0.10″ (0.4%) Speedometer Error (%): Error = (New Diameter ÷ Stock Diameter − 1) × 100 Larger tire → speedometer reads LOW (you are going faster than displayed). ES 215/55R17 (26.31″) to 235/45R18 (26.33″): +0.1% diameter, effectively no speedometer change.
Lexus Tire Sizing: The Complete Model Guide
These sizes come from Lexus's own owner's manuals. Lexus says not to use tire sizes other than those it recommends and not to mix tires of different makes, models or tread patterns, so treat anything outside these lists as something to confirm with a Lexus dealer. The Lexus tire guide has more on the manuals' statements, and Lexus compact spare limits are quoted in the spare tire chart.
The IS changed sizes with the 2021 refresh. The 2016 to 2020 manuals list 225/45R17 and a staggered 225/40R18 front with 255/35R18 rear; the 2021 to 2024 manuals list 235/45R18 and a staggered 235/40R19 front with 265/35R19 rear. The staggered front and rear diameter check compares a staggered pair as a percentage.
The ES lists 215/55R17, 235/45R18 and 235/40R19 from 2019 to 2024. The NX changed with the 2022 redesign to 235/60R18 and 235/50R20. The RX changed with the 2023 redesign to 235/60R19 and 235/50R21.
The GX and LX list 265-wide tires from 18 to 22 inches. Wheel nut torque is 76 ft-lbf on the older cars and 103 ft-lbf (140 N-m) on the 2021+ IS, 2022+ NX and 2023+ RX; the GX 550 and LX 600 list 97 ft-lbf (131 N-m).